function preLoad() {
	if (!this.support.loading) {
		alert("You need the Flash Player to use SWFUpload.");
		return false;
	} else if (!this.support.imageResize) {
		alert("You need Flash Player 10 to upload resized images.");
		return false;
	}
}
function loadFailed() {
	alert("Something went wrong while loading SWFUpload. If this were a real application we'd clean up and then give you an alternative");
}

function fileQueueError(file, errorCode, message) {
	try {
		var imageName = "error.gif";
		var errorName = "";
		if (errorCode === SWFUpload.errorCode_QUEUE_LIMIT_EXCEEDED) {
			errorName = "You have attempted to queue too many files.";
		}

		if (errorName !== "") {
			alert(errorName);
			return;
		}

		switch (errorCode) {
		case SWFUpload.QUEUE_ERROR.ZERO_BYTE_FILE:
			imageName = "zerobyte.gif";
			break;
		case SWFUpload.QUEUE_ERROR.FILE_EXCEEDS_SIZE_LIMIT:
			imageName = "toobig.gif";
			break;
		case SWFUpload.QUEUE_ERROR.ZERO_BYTE_FILE:
		case SWFUpload.QUEUE_ERROR.INVALID_FILETYPE:
		default:
			alert(message);
			break;
		}

		addImage("images/" + imageName,this.customSettings.thumbnail_img_div_id,"");

	} catch (ex) {
		this.debug(ex);
	}
}
function fileDialogComplete(numFilesSelected, numFilesQueued) {
	try {
		if (numFilesQueued > 0) {
		    $("#"+this.customSettings.upload_target).show();
			this.startResizedUpload(this.getFile(0).ID, this.customSettings.image_width, this.customSettings.image_height, SWFUpload.RESIZE_ENCODING.JPEG, 100);
		}
	} catch (ex) {
		this.debug(ex);
	}
}

function uploadProgress(file, bytesLoaded) {

	try {
		var percent = Math.ceil((bytesLoaded / file.size) * 100);

		var progress = new FileProgress(file,  this.customSettings.upload_target);
		progress.setProgress(percent);
		progress.setStatus("正在上传...");
		progress.toggleCancel(true, this);
	} catch (ex) {
		this.debug(ex);
	}
}

function uploadSuccess(file, serverData) {
	try {
		var progress = new FileProgress(file,  this.customSettings.upload_target);

		if (serverData.substring(0, 7) === "FILEID:") {
			//addImage("thumbnail.php?id=" + serverData.substring(7));
			addImage(this.customSettings.image_path + serverData.substring(7),this.customSettings.thumbnail_img_div_id,this.customSettings.image_file_names);

			progress.setStatus("上传完成.");
			progress.toggleCancel(false);
			var thumbnailImageNames = $("#"+this.customSettings.image_file_names).val();
			$("#"+this.customSettings.image_file_names).val(thumbnailImageNames + serverData.substring(7)+"_image_");
		} else {
			addImage("images/error.gif",this.customSettings.thumbnail_img_div_id,"");
			progress.setStatus("Error.");
			progress.toggleCancel(false);
			//alert(serverData);
		}

	} catch (ex) {
		this.debug(ex);
	}
}

function uploadComplete(file) {
	try {
		/*  I want the next upload to continue automatically so I'll call startUpload here */
		if (this.getStats().files_queued > 0) {
			this.startResizedUpload(this.getFile(0).ID, this.customSettings.image_width, this.customSettings.image_height, SWFUpload.RESIZE_ENCODING.JPEG, 100);
		} else {
			var progress = new FileProgress(file,  this.customSettings.upload_target);
			progress.setComplete();
			progress.setStatus("上传完毕");
			$("#"+this.customSettings.upload_target).hide();
			progress.toggleCancel(false);
		}
	} catch (ex) {
		this.debug(ex);
	}
}

function uploadError(file, errorCode, message) {
	var imageName =  "error.gif";
	var progress;
	try {
		switch (errorCode) {
		case SWFUpload.UPLOAD_ERROR.FILE_CANCELLED:
			try {
				progress = new FileProgress(file,  this.customSettings.upload_target);
				progress.setCancelled();
				progress.setStatus("Cancelled");
				progress.toggleCancel(false);
			}
			catch (ex1) {
				this.debug(ex1);
			}
			break;
		case SWFUpload.UPLOAD_ERROR.UPLOAD_STOPPED:
			try {
				progress = new FileProgress(file,  this.customSettings.upload_target);
				progress.setCancelled();
				progress.setStatus("Stopped");
				progress.toggleCancel(true);
			}
			catch (ex2) {
				this.debug(ex2);
			}
		case SWFUpload.UPLOAD_ERROR.UPLOAD_LIMIT_EXCEEDED:
			imageName = "uploadlimit.gif";
			break;
		default:
			alert(message);
			break;
		}

		addImage("images/" + imageName,this.customSettings.thumbnail_img_div_id,"");

	} catch (ex3) {
		this.debug(ex3);
	}

}

/**
 * 等比例缩小图片
 * @param ImgD
 * @param FitWidth
 * @param FitHeight
 * @return
 */
function drawImage(ImgD,FitWidth,FitHeight){
	var image=new Image();
	image.src=ImgD.src;
	if(image.width>0 && image.height>0){
		if(image.width/image.height>= FitWidth/FitHeight){
			if(image.width>FitWidth){
				ImgD.width=FitWidth;
				ImgD.height=(image.height*FitWidth)/image.width;	
			}else{
				ImgD.width=image.width;
				ImgD.height=image.height;
			}
		} else{
			if(image.height>FitHeight){
				ImgD.height=FitHeight;
				ImgD.width=(image.width*FitHeight)/image.height;
			}else{
				ImgD.width=image.width;
				ImgD.height=image.height;	
			}
		}
	}
} 

function getContextPath(){
	var localObj = window.location;
	var contextPath = localObj.pathname.split("/")[1];
	var basePath = localObj.protocol+"//"+localObj.host+"/"+contextPath;
	return basePath;
}
function addImage(src,thumbnailsId,imageFileNames) {
	var imgDiv = document.createElement("div");
	imgDiv.className = "product-img-div";
	var imgDiv1 = document.createElement("div");
	imgDiv1.className = "product-img-div-1";
	var newImg = document.createElement("img");
	newImg.style.margin = "5px";

	document.getElementById(thumbnailsId).appendChild(imgDiv);

	newImg.onload = function () {
		fadeIn(newImg, 0);
		drawImage(newImg,100,100);
	};
	newImg.src = getContextPath() + src;
	imgDiv1.appendChild(newImg);
	imgDiv.appendChild(imgDiv1);
	if(imageFileNames!=""){
	    var imgOperationDiv = document.createElement("div");
		imgOperationDiv.onclick = function(){
			onclickImgDelete(src,imgDiv,imageFileNames);
		}
		imgOperationDiv.style.textAlign = "center";
		imgOperationDiv.style.cursor = "pointer";
		imgOperationDiv.innerHTML = "删除&nbsp;&nbsp;";
		imgDiv.appendChild(imgOperationDiv);
	}
}

function onclickImgDelete(imgSrc,imgDiv,imageFileNames){
    $.getJSON(getContextPath() + "/member/product/deleteImage",{imageName:imgSrc},function(data){
		   imgDiv.style.display = "none";
		   var imageFileNames0 = $("#"+imageFileNames).val();
		   if(imageFileNames0!=null){
		      var imgFileNames = imageFileNames0.split("_image_");
		      if(imgFileNames!=null&&imgFileNames.length>0){
		         var imgFileNames0 = "";
		         for(var i=0;i<imgFileNames.length;i++){
		            if(imgSrc.indexOf(imgFileNames[i])==-1){
		               imgFileNames0 += imgFileNames[i] + "_image_";
		            }
		         }
		         $("#"+imageFileNames).val(imgFileNames0);
		      }
		   }
    });
}
/**
 *修改产品时操作
 */
function onclickImgDelete1(imgId,imgDiv,imageFileName){
	$.ajax({
		type:"POST",
		url:getContextPath() + "/system/ajax/product-image-ajax!delete.do",
		data:"id="+imgId+"&name="+imageFileName,
		dataType:"json",
		success:function(data){
		   document.getElementById(imgDiv).style.display = "none";
		},
		error:function(data){
		   alert("获取数据失败!");
		}
	});
}
function fadeIn(element, opacity) {
	var reduceOpacityBy = 5;
	var rate = 30;	// 15 fps


	if (opacity < 100) {
		opacity += reduceOpacityBy;
		if (opacity > 100) {
			opacity = 100;
		}

		if (element.filters) {
			try {
				element.filters.item("DXImageTransform.Microsoft.Alpha").opacity = opacity;
			} catch (e) {
				// If it is not set initially, the browser will throw an error.  This will set it if it is not set yet.
				element.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity=' + opacity + ')';
			}
		} else {
			element.style.opacity = opacity / 100;
		}
	}

	if (opacity < 100) {
		setTimeout(function () {
			fadeIn(element, opacity);
		}, rate);
	}
}



/* ******************************************
 *	FileProgress Object
 *	Control object for displaying file info
 * ****************************************** */

function FileProgress(file, targetID) {
	this.fileProgressID = "divFileProgress";

	this.fileProgressWrapper = document.getElementById(this.fileProgressID);
	if (!this.fileProgressWrapper) {
		this.fileProgressWrapper = document.createElement("div");
		this.fileProgressWrapper.className = "progressWrapper";
		this.fileProgressWrapper.id = this.fileProgressID;

		this.fileProgressElement = document.createElement("div");
		this.fileProgressElement.className = "progressContainer";

		var progressCancel = document.createElement("a");
		progressCancel.className = "progressCancel";
		progressCancel.href = "#";
		progressCancel.style.visibility = "hidden";
		progressCancel.appendChild(document.createTextNode(" "));

		var progressText = document.createElement("div");
		progressText.className = "progressName";
		progressText.appendChild(document.createTextNode(file.name));

		var progressBar = document.createElement("div");
		progressBar.className = "progressBarInProgress";

		var progressStatus = document.createElement("div");
		progressStatus.className = "progressBarStatus";
		progressStatus.innerHTML = "&nbsp;";

		this.fileProgressElement.appendChild(progressCancel);
		this.fileProgressElement.appendChild(progressText);
		this.fileProgressElement.appendChild(progressStatus);
		this.fileProgressElement.appendChild(progressBar);

		this.fileProgressWrapper.appendChild(this.fileProgressElement);

		document.getElementById(targetID).appendChild(this.fileProgressWrapper);
		fadeIn(this.fileProgressWrapper, 0);

	} else {
		this.fileProgressElement = this.fileProgressWrapper.firstChild;
		this.fileProgressElement.childNodes[1].firstChild.nodeValue = file.name;
	}

	this.height = this.fileProgressWrapper.offsetHeight;

}
FileProgress.prototype.setProgress = function (percentage) {
	this.fileProgressElement.className = "progressContainer green";
	this.fileProgressElement.childNodes[3].className = "progressBarInProgress";
	this.fileProgressElement.childNodes[3].style.width = percentage + "%";
};
FileProgress.prototype.setComplete = function () {
	this.fileProgressElement.className = "progressContainer blue";
	this.fileProgressElement.childNodes[3].className = "progressBarComplete";
	this.fileProgressElement.childNodes[3].style.width = "";

};
FileProgress.prototype.setError = function () {
	this.fileProgressElement.className = "progressContainer red";
	this.fileProgressElement.childNodes[3].className = "progressBarError";
	this.fileProgressElement.childNodes[3].style.width = "";

};
FileProgress.prototype.setCancelled = function () {
	this.fileProgressElement.className = "progressContainer";
	this.fileProgressElement.childNodes[3].className = "progressBarError";
	this.fileProgressElement.childNodes[3].style.width = "";

};
FileProgress.prototype.setStatus = function (status) {
	this.fileProgressElement.childNodes[2].innerHTML = status;
};

FileProgress.prototype.toggleCancel = function (show, swfuploadInstance) {
	this.fileProgressElement.childNodes[0].style.visibility = show ? "visible" : "hidden";
	if (swfuploadInstance) {
		var fileID = this.fileProgressID;
		this.fileProgressElement.childNodes[0].onclick = function () {
			swfuploadInstance.cancelUpload(fileID);
			return false;
		};
	}
};
